Air 802 AP-G250 User manual

Wireless LAN Device Series
AP-G250
Multi-Function WLAN AP
User Manual
Version 1.0 (October 2008)

AP-G250 User Manual i
TABLE OF CONTENTS
SAFETY AND REGULATORY NOTICES..................................................................................................... 1
FCC STATEMENT ........................................................................................................................................ 1
FCC CAUTION ............................................................................................................................................ 1
FCC RF RADIATION EXPOSURE STATEMENT ................................................................................................ 1
CANADIAN DEPARTMENT OF COMMUNICATIONS INDUSTRY CANADA (IC) NOTICE............................................. 2
SAFETY GUIDELINES ................................................................................................................................. 2
PACKING LIST ............................................................................................................................................. 3
PRODUCT OVERVIEW ................................................................................................................................ 4
FRONT VIEW ............................................................................................................................................... 4
REAR VIEW ................................................................................................................................................. 4
HARDWARE INSTALLATION ...................................................................................................................... 5
CONFIGURATION PREPARATION ............................................................................................................. 5
HOW TO ACCESS CONFIGURATION AREA ...................................................................................................... 5
BASIC LOGICAL PARTITIONING...................................................................................................................... 5
DEFAULT IP ADDRESS ................................................................................................................................. 5
HOW TO SEE YOUR COMPUTER’S IP ADDRESS ............................................................................................. 6
HOW TO TEMPORARILY ASSIGN AN IP ADDRESS TO YOUR COMPUTER............................................................ 6
ACCESSIBILITY TO CONFIGURATION VS.OPERATING MODE .......................................................................... 11
DHCP...................................................................................................................................................... 11
WIRELESS CONFIGURATION .................................................................................................................. 12
OPERATION AND WIRELESS MODES ........................................................................................................... 12
Operational Modes .............................................................................................................................................12
Wireless Modes ..................................................................................................................................................12
OPERATIONAL MODES OVERVIEW .............................................................................................................. 12
Router.................................................................................................................................................................12
Bridge .................................................................................................................................................................12
WISP (Wireless ISP)...........................................................................................................................................13
WIRELESS MODES OVERVIEW ................................................................................................................... 13
AP (Access Point)...............................................................................................................................................13
Client ..................................................................................................................................................................13
WDS (Wireless Distribution System) ..................................................................................................................13
WDS+AP ............................................................................................................................................................14
WIRELESS BASIC SETTINGS....................................................................................................................... 14
Disable Wireless LAN Interface ..........................................................................................................................14
Band ...................................................................................................................................................................14
Mode ..................................................................................................................................................................15
Network Type......................................................................................................................................................15
SSID ...................................................................................................................................................................16
Channel Number ................................................................................................................................................16
Show Active Clients ............................................................................................................................................17
Mac Clone (Single Ethernet Client) ....................................................................................................................17
Universal Repeater.............................................................................................................................................18
WIRELESS ADVANCED SETTINGS................................................................................................................ 19
Authentication Type ............................................................................................................................................20
Fragment Threshold ...........................................................................................................................................20
RTS Threshold....................................................................................................................................................20
Beacon Interval...................................................................................................................................................20
ACK Timing ........................................................................................................................................................21
Client Expired Time ............................................................................................................................................21

AP-G250 User Manual ii
MTU Size............................................................................................................................................................21
Data Rate ...........................................................................................................................................................21
Preamble Type....................................................................................................................................................21
Broadcast SSID ..................................................................................................................................................21
IAPP (Inter-Access Point Protocol).....................................................................................................................22
802.11g Protection..............................................................................................................................................22
Block WLAN Relay (Isolate Client) .....................................................................................................................22
Turbo Mode ........................................................................................................................................................22
Transmit Power...................................................................................................................................................22
CONFIGURING WIRELESS SECURITY........................................................................................................... 23
WEP Encryption Setting .....................................................................................................................................23
WEP Encryption with 802.1x Setting ..................................................................................................................25
WPA Authentication Mode ..................................................................................................................................26
WIRELESS ACCESS CONTROL .................................................................................................................... 27
WDS........................................................................................................................................................ 27
WDS Network Topology......................................................................................................................................28
WDS Application.................................................................................................................................................32
Site Survey .........................................................................................................................................................33
Connecting Profile ..............................................................................................................................................34
TCP/IP CONFIGURATION ......................................................................................................................... 36
LAN INTERFACE........................................................................................................................................ 36
Default Gateway .................................................................................................................................................36
DHCP Server......................................................................................................................................................36
DHCP Client Range............................................................................................................................................37
WAN INTERFACE ...................................................................................................................................... 38
Static IP ..............................................................................................................................................................39
DHCP Client (Dynamic IP)..................................................................................................................................40
PPPoE................................................................................................................................................................41
PPTP ..................................................................................................................................................................42
Configuring Clone MAC Address........................................................................................................................43
VPN Pass-through..............................................................................................................................................45
ROUTE ................................................................................................................................................... 46
NAT (Network Address Translation)....................................................................................................................46
IP Forwarding Default Policy ..............................................................................................................................47
Static Route Setup..............................................................................................................................................47
Dynamic Route Setup.........................................................................................................................................48
FIREWALL CONFIGURATION................................................................................................................... 50
CONFIGURING LAN TO WAN FIREWALL...................................................................................................... 50
PORT FILTERING ....................................................................................................................................... 50
IP FILTERING............................................................................................................................................. 51
MAC FILTERING ........................................................................................................................................ 52
CONFIGURING PORT FORWARDING (VIRTUAL SERVER)................................................................................ 53
Multiple Servers behind NAT (Example).............................................................................................................54
CONFIGURING DMZ .................................................................................................................................. 55
CONFIGURING VPN................................................................................................................................... 56
MANAGEMENT .......................................................................................................................................... 57
STATUS..................................................................................................................................................... 57
QUALITY OF SERVICE (QOS)...................................................................................................................... 58
BANDWIDTH CONTROL............................................................................................................................... 61
SNMP AGENT........................................................................................................................................... 62
STATISTICS ............................................................................................................................................... 65
TIME ZONE SETTING.................................................................................................................................. 65
LOG.......................................................................................................................................................... 66
MISCELLANEOUS SETTINGS ....................................................................................................................... 66
HTTP Port...........................................................................................................................................................66
PING WATCHDOG...................................................................................................................................... 67

AP-G250 User Manual iii
MESH NETWORK ....................................................................................................................................... 68
UPGRADE FIRMWARE ................................................................................................................................74
Firmware Overview.............................................................................................................................................74
Firmware Upgrade Procedure ............................................................................................................................74
Save/Reload Settings .........................................................................................................................................75
Password............................................................................................................................................................76
USING CLI MENU ...................................................................................................................................... 77
START A SSH (SECURE SHELL)CLIENT SESSION......................................................................................... 77
EXECUTE CLI PROGRAM............................................................................................................................ 77
AUTO-DISCOVERY TOOL......................................................................................................................... 79
TROUBLESHOOTING................................................................................................................................ 81
Basics.................................................................................................................................................................81
Power Light Not On ............................................................................................................................................81
Ethernet Light (LED) Not On...............................................................................................................................81
Web Browser Configuration Screen Not Available..............................................................................................81
Configuration Changes Not Saved .....................................................................................................................82
No Internet Access .............................................................................................................................................82
Troubleshooting a TCP/IP Network Using a Ping Utility......................................................................................85
Testing the Path from Your Computer to a Remote Device ................................................................................86
APPENDIX A .............................................................................................................................................. 87
TECHNICAL SPECIFICATIONS ...................................................................................................................... 87
APPENDIX B .............................................................................................................................................. 91
BASIC WIRELESS BRIDGED ACCESS POINT................................................................................................. 91
BASIC WIRELESS ROUTER......................................................................................................................... 91
UNIVERSAL REPEATER MODE .................................................................................................................... 91
WDS OR WDS+AP MODE ........................................................................................................................ 92
CLIENT MODE ........................................................................................................................................... 92

AP-G250 User Manual 1
SAFETY AND REGULATORY NOTICES
FCC Statement
The AP-G250 Access Point has been tested and found to comply with the specifications
for a Class B digital device, pursuant to Part 15 of the FCC Rules. Operation is subject
to the following two conditions:
yThis device may not cause harmful interference
yThis device must accept any interference received, including interference that
may cause undesired operation.
These limits are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used according to the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which is found by turning the
equipment off and on, the user is encouraged to try and correct the interference by one
or more of the following measures:
yReorient or relocate the receiving antenna
yIncrease the separation between the equipment or devices
yConnect the equipment to an outlet other than the receiver’s
yConsult a dealer or an experienced radio/TV technician for assistance
FCC Caution
Any change of modification to the product not expressly approved by AIR802 could void
the user’s authority to operate the device.
FCC RF Radiation Exposure Statement
To comply with the FCC rules 47 CFR 1.1307 and ANSI C95.1 RF exposure limits, the
antenna(s) for this device must comply with the following:
A minimum separation distance of at least 20cm (8 inches) is required between the
antenna and all persons.

AP-G250 User Manual 2
Canadian Department of Communications Industry
Canada (IC) Notice
This Class B digital apparatus complies with Canadian ICES-003 and RSS-210.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 et CNR-210
du Canada.
Safety Guidelines
yDo not touch or move antenna(s) while the unit is transmitting or receiving.
yDo not hold any component containing a radio such that the antenna is very
close to or touching any exposed parts of the body, especially the face and eyes,
while transmitting.
yDo not operate the radio or attempt to transmit data unless the antenna is
connected; otherwise the radio may be damaged.
yAntenna selection and installation should follow the rules of the country in which
the device is being installed. Professional installation is recommended.

AP-G250 User Manual 3
PACKING LIST
Before you start to install the AP-G250, make sure the package contains the following
items
yAP-G250 unit
yAntenna
yPower Supply
yEthernet Network Cable
yCD

AP-G250 User Manual 4
PRODUCT OVERVIEW
Front View
Rear View
1. Power supply connector
2. WAN/LAN Connector – This port can be used as a WAN interface that connects
to a DSL or Cable Modem, or as a LAN port for connection to a computer, printer
or other networked device.
3. LAN Port – This port connects a computer, printer or other networked device.
4. Reset Button
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AP-G250 User Manual 5
HARDWARE INSTALLATION
Once you have ensured that you have all required components, you can install the
AP-G250.
1. Connect the Ethernet network cable between the WAN/LAN Interface Connector at
the rear of the AP and your network. The network connection may be a cable or DSL
modem, existing router or other device. For some applications, a cable is not
required.
2. Connect the power supply to the Power Supply Connector to the rear of the AP and
to the power outlet.
3. Connect another Ethernet network cable (not supplied with the AP) between the
LAN Interface Connector and a computer or other network device, as required.
4. Initial configuration can be performed using the wired LAN port or via wireless
connection.
You can now proceed to use the computer to configure the AP-G250.
CONFIGURATION PREPARATION
How to Access Configuration Area
There are two ways to configure the device:
1. Using a web-browser, such as Internet Explorer.
2. Using a Secure Shell CLI Interface.
Basic Logical Partitioning
For many first time users, it might be useful to consider the AP-G250 as having two
logical sections: a wired Ethernet network interface (NIC) and an 802.11b/g wireless
network interface (NIC). Each interface has its own MAC address.
Default IP Address
The AP-G250 has a default LAN IP address of 192.168.2.254 and a subnet-mask
address of 255.255.255.0. To access the AP-G250 configuration, you must first ensure
that your computer’s IP address is on the same subnet (192.168.2.X) as the default IP

AP-G250 User Manual 6
address. For example, you can assign your computer an IP address of 192.168.2.200.
Do not assign 192.168.2.254 (this is the IP address of the AP-G250).
Your computer probably is set to “Obtain IP Address Automatically”. If the last IP
address was on another network, such as 192.168.1.200, then you will not be able to
connect without temporarily assigning your computer an IP address in the same subnet.
Typically, the AP-G250 is accessed via the LAN or wireless interface, however if you
need to access the AP-G250 via the WAN interface, the default IP address is 172.1.1.1
and you will need to ensure that you are on the same subnet (172.1.1.X).
How to See Your Computer’s IP Address
For a Windows-based computer, follow these steps:
1. Click Start > Run.
2. Type CMD in the Open: field and click OK.
3. Type ipconfig at the cursor prompt and press Enter.
4. Scroll to Ethernet Adapter Local Area Connection and note the listing for IP
address.
How to Temporarily Assign an IP Address to Your
Computer
The following example illustrates the procedure for statically assigning an IP address in
the same subnet as the default address.
Windows XP
1. Click Start, right click My Network Places and click Properties.